Based on Chapter 6, what is the role and significance of the Sadguru in a devotee's life?

According to the sixth chapter of Sai Satcharitra, the Sadguru is paramount for both spiritual and worldly matters, acting as a helmsman who guides the devotee's boat to the far shore. The text emphasizes that the Sadguru's blessing hand, when placed on a devotee's head, causes the heart to overflow with self-bliss. This divine touch is so powerful that it can burn away the subtle body of ego and wash away the accumulated impurities of many lifetimes. As described in Chapter 6, by surrendering completely to a capable Sadguru like Sai, a devotee can naturally attain the four goals of life: Dharma, Artha, Kama, and Moksha, without even asking for them.